This is the Reds’ 11th victory in 12 matches across all competitions, and a seventh on the spin in the league.
Whilst answering questions in a press conference on Wednesday, Arteta said he “100 per cent” believes Wilshere might be back at the club soon.
Cristiano Ronaldo, who turned 37 at the weekend, came in as substitute for Edison Cavani. But could not save United this time.
Bowen’s 56th minute goal for West Ham made the Hammers the first EPL side to score two goals against Chelsea this season.
Sunday’s win which moves West Ham above Liverpool on the EPL log is David Moyes’ first win against Liverpool since 2010.
United narrowly defeated Hammer 2-1, moving into second position on the Premier League table, behind Liverpool on goal difference.
In Group H action, West Ham United began their Europa League campaign with a 2-0 win at Dinamo Zagreb.
Senegalese striker Demba Ba has retired from playing football after a 16-year career.
United will face Premier League side West Ham in the fifth round of the FA Cup.
